parse "gopher://\xba\x02\xe3Z\x01\x00\xbe\x8e\xbb\xe9\xf5.I\xfaG\x99\xb3\xad\x9dSb\xb7`\xf9M\xdd{\vI \x1c<\x17\xf90": net/url: invalid control character in URL